Users can program their own seKngs to allow the window to open with the preferred display.
8. The display will darken a er a few minutes of inac"vity to conserve ba*ery power. Touching the
screen will return the screen to full brightness based on the brightness seKngs.(see 15N & 15O to
change display dimming/off seKngs)
3F. Quick Start – Common Problems:
The two most common causes of error are incorrect calibra"on
factor use and improper zero. It is a good prac"ce to verify the correct calibra"on factor is in use
before taking measurements. It is equally as important to assure a proper zero has been performed.
3F1. Calibra on Factor Verifica on.
Locate the calibra"on factor on the detector calibra"on
cer"ficate below the model and serial number fields in the top third of the report.
Example:
From the home screen select seKngs, scroll to the second seKng window labeled Factor Number.
Verify the sensi"vity factor and factor units are correct. If not touch the selec"on window and a
scroll menu will appear, select a new channel un"l you find the correct sensi"vity factor as noted
on your cer"ficate. (If you do not locate your calibra"on factor and units from the cer"ficate, go
to 5D to learn about adding/changing calibra"on factors)
Touch the back bu*on to return to the home screen.
3F2. Zero:
There are two kinds of zero that can be used to improve accuracy. A
dark zero
is used
to remove small ambient noise caused from the environment. With the sensor plugged in and
covered with an opaque object, press the zero bu*on. This reading will be subtracted from all
future readings to provide a zero reading. An
ambient zero
is used to subtract small background
light levels that are not coming from the test source. With the test source off or blocked and the
sensor exposed to the environment/ambient light, press zero. (An example of an ambient zero
source is a computer display that is needed during tes"ng.) Place the un-covered sensor in the
test loca"on. Cover the test light source, or turn it off. Press Zero. The ILT2400 will take a
measurement and subtract that value from all future readings un"l zero is pressed again.
3G. Quick Start Feature Overview:
3G1. Display resolu on:
The < - and- > bu*ons below the display will allow the user the control
how many digits are displayed. Ie. 0.11 changes to 0.1111.
3G2. Display Units:
Toggles between the available fields; current, light level, OD, and % trans.
To take calibrated light level readings, press display units un"l light level is selected.
Note:
If light level is selected prior to selec"ng a calibra"on/sensi"vity factor, an error
message Set Factor will appear in place of light level readings (see 15P1 for selec"ng factors).
ILT2400 INSTRUMENTATION MANUAL REV 1, 4/16
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